MINOLTA-QMS PagePro 9100 Series Quick Start Manual page 177

Symptom
Toner smudges on backside
of paper
Low image density
Foggy background
Cause
Dirty heat roller
Dirty image transfer roller
Dirty paper transport path
No toner in imaging cartridge
Defective PC drum (end of service
life)
Poor developing bias
Poor image transfer
Incorrect temperature detection
Incorrect humidity detection
Poor developing bias
Improper charging
Incorrect temperature detection
Incorrect humidity detection
Defective PC drum (end of service
life)
169
Remedy
• Replace the heat roller.
• Replace the fusing unit.
• Replace the image transfer roller
unit.
• Clean the paper path within the
printer.
• Replace the imaging cartridge.
• Replace the high voltage unit (HV1).
• Replace the main control board
(PWB-A).
• Replace thermistor 2 (TH2).
• Replace humidity sensor (HS1).
• Replace the high voltage unit (HV1).
• Replace the main control board
(PWB-A).
• Replace thermistor 2 (TH2).
• Replace humidity sensor (HS1).
• Replace the imaging cartridge.
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